/*

 * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package jdk.nio.zipfs;

import java.nio.file.attribute.*;

import java.io.IOException;

import java.util.LinkedHashMap;

import java.util.Map;

/*

 * @author  Xueming Shen, Rajendra Gutupalli, Jaya Hangal

 */

class ZipFileAttributeView implements BasicFileAttributeView

{

    private static enum AttrID {

        size,

        creationTime,

        lastAccessTime,

        lastModifiedTime,

        isDirectory,

        isRegularFile,

        isSymbolicLink,

        isOther,

        fileKey,

        compressedSize,

        crc,

        method

    };

    private final ZipPath path;

    private final boolean isZipView;

    private ZipFileAttributeView(ZipPath path, boolean isZipView) {

        this.path = path;

        this.isZipView = isZipView;

    }

    @SuppressWarnings("unchecked") // Cast to V

    static <V extends FileAttributeView> V get(ZipPath path, Class<V> type) {

        if (type == null)

            throw new NullPointerException();

        if (type == BasicFileAttributeView.class)

            return (V)new ZipFileAttributeView(path, false);

        if (type == ZipFileAttributeView.class)

            return (V)new ZipFileAttributeView(path, true);

        return null;

    }

    static ZipFileAttributeView get(ZipPath path, String type) {

        if (type == null)

            throw new NullPointerException();

        if (type.equals("basic"))

            return new ZipFileAttributeView(path, false);

        if (type.equals("zip"))

            return new ZipFileAttributeView(path, true);

        return null;

    }

    @Override

    public String name() {

        return isZipView ? "zip" : "basic";

    }

    public ZipFileAttributes readAttributes() throws IOException

    {

        return path.getAttributes();

    }

    @Override

    public void setTimes(FileTime lastModifiedTime,

                         FileTime lastAccessTime,

                         FileTime createTime)

        throws IOException

    {

        path.setTimes(lastModifiedTime, lastAccessTime, createTime);

    }

    void setAttribute(String attribute, Object value)

        throws IOException

    {

        try {

            if (AttrID.valueOf(attribute) == AttrID.lastModifiedTime)

                setTimes ((FileTime)value, null, null);

            if (AttrID.valueOf(attribute) == AttrID.lastAccessTime)

                setTimes (null, (FileTime)value, null);

            if (AttrID.valueOf(attribute) == AttrID.creationTime)

                setTimes (null, null, (FileTime)value);

            return;

        } catch (IllegalArgumentException x) {}

        throw new UnsupportedOperationException("'" + attribute +

            "' is unknown or read-only attribute");

    }

    Map<String, Object> readAttributes(String attributes)

        throws IOException

    {

        ZipFileAttributes zfas = readAttributes();

        LinkedHashMap<String, Object> map = new LinkedHashMap<>();

        if ("*".equals(attributes)) {

            for (AttrID id : AttrID.values()) {

                try {

                    map.put(id.name(), attribute(id, zfas));

                } catch (IllegalArgumentException x) {}

            }

        } else {

            String[] as = attributes.split(",");

            for (String a : as) {

                try {

                    map.put(a, attribute(AttrID.valueOf(a), zfas));

                } catch (IllegalArgumentException x) {}

            }

        }

        return map;

    }

    Object attribute(AttrID id, ZipFileAttributes zfas) {

        switch (id) {

        case size:

            return zfas.size();

        case creationTime:

            return zfas.creationTime();

        case lastAccessTime:

            return zfas.lastAccessTime();

        case lastModifiedTime:

            return zfas.lastModifiedTime();

        case isDirectory:

            return zfas.isDirectory();

        case isRegularFile:

            return zfas.isRegularFile();

        case isSymbolicLink:

            return zfas.isSymbolicLink();

        case isOther:

            return zfas.isOther();

        case fileKey:

            return zfas.fileKey();

        case compressedSize:

            if (isZipView)

                return zfas.compressedSize();

            break;

        case crc:

            if (isZipView)

                return zfas.crc();

            break;

        case method:

            if (isZipView)

                return zfas.method();

            break;

        }

        return null;

    }

}